This is the 10th book in the Neptune King series. In The Case of the Amnesiac Client Neptune's maid introduces him to Mary North a troubled young woman working as a maid with no memory and a vague impression that everything is not quite right. He figures it's a case for K&J. Intrigue, deception and imposters lead them to France and back again to high society in search for her real identity. In The Case of the French Blackmailer, Shark's sins come back to haunt him when Monique, the French waitress he met while on the trail of the Shadow in France turns up with a baby, claiming it is his and threatening to tell Lord Evans unless he pays. Shark is shocked and desperate and turns to Neptune for help, while hoping to keep the whole sordid affair secret from Rachel and Becky, but he underestimates the women in his life. In The Case of the Deadly Sleepwalker Lisa Hatherly is arrested for murdering her neighbour in her sleep! Philip Briton, Neptune's solicitor hires the boys to investigate. The evidence looks black against her-her footprints in the snow to and from the dead woman's house, the dead woman's jewels hidden in her wardrobe and her own admission that she'd had an argument with the deceased and was sleep walking that night with her soaked slippers matching the prints. Neptune's boutique is being robbed in The Case of the Shoplifting Shop Assistant, and it doesn't take him long to find the culprit. Meantime, Shark's family have arrived from Australia in time to celebrate Christmas with his friends in his new house.